r/db_instance - add listener_endpoint + validations

[DrFaust92]

Description

Relations

Closes #28389

References

Output from Acceptance Testing

$ make testacc TESTS=TestAccRDSInstance_basic PKG=rds

--- PASS: TestAccRDSInstance_basic (417.19s)

[github-actions]

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccRDSInstance_basic' PKG=rds ACCTEST_PARALLELISM=2 
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/rds/... -v -count 1 -parallel 2  -run=TestAccRDSInstance_basic -timeout 180m
=== RUN   TestAccRDSInstance_basic
=== PAUSE TestAccRDSInstance_basic
=== CONT  TestAccRDSInstance_basic
--- PASS: TestAccRDSInstance_basic (583.53s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/rds	588.738s
% make testacc TESTARGS='-run=TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer' PKG=rds ACCTEST_PARALLELISM=2 
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/rds/... -v -count 1 -parallel 2  -run=TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer -timeout 180m
=== RUN   TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer
=== PAUSE TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer
=== CONT  TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer
--- PASS: TestAccRDSInstance_SnapshotIdentifier_multiAZSQLServer (5568.05s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/rds	5573.307s

[ewbankkit]

@DrFaust92 Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v4.58.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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